Code | Difference | = 50mph | 1000miles = | Diameter | Wall,in | Wall,mm |
---|---|---|---|---|---|---|
165/60-18 | 0.00 % | 50.00 | 1,000.00 | 25.80 | 3.90 | 99.00 |
175/35-21 | +0.11 % | 50.05 | 998.93 | 25.82 | 2.41 | 61.25 |
185/40-20 | +0.12 % | 50.06 | 998.78 | 25.83 | 2.91 | 74.00 |
195/70-15 | -0.18 % | 49.91 | 1,001.83 | 25.75 | 5.37 | 136.50 |
205/30-21 | +0.18 % | 50.09 | 998.17 | 25.84 | 2.42 | 61.50 |
165/75-16 | -0.20 % | 49.90 | 1,001.98 | 25.74 | 4.87 | 123.75 |
165/45-20 | +0.20 % | 50.10 | 998.02 | 25.85 | 2.92 | 74.25 |
185/60-17 | -0.21 % | 49.89 | 1,002.14 | 25.74 | 4.37 | 111.00 |
205/85-12 | -0.29 % | 49.86 | 1,002.90 | 25.72 | 6.86 | 174.25 |
175/85-14 | -0.32 % | 49.84 | 1,003.21 | 25.71 | 5.86 | 148.75 |
195/60-16.5 | -0.32 % | 49.84 | 1,003.21 | 25.71 | 4.61 | 117.00 |
205/55-17 | +0.32 % | 50.16 | 996.79 | 25.88 | 4.44 | 112.75 |
175/50-19 | +0.37 % | 50.18 | 996.34 | 25.89 | 3.44 | 87.50 |
205/60-16 | -0.43 % | 49.79 | 1,004.27 | 25.69 | 4.84 | 123.00 |
195/45-19 | +0.44 % | 50.22 | 995.57 | 25.91 | 3.45 | 87.75 |
195/50-18 | -0.46 % | 49.77 | 1,004.58 | 25.68 | 3.84 | 97.50 |
205/80-13 | +0.46 % | 50.23 | 995.42 | 25.91 | 6.46 | 164.00 |
185/75-15 | +0.50 % | 50.25 | 994.96 | 25.93 | 5.46 | 138.75 |
185/80-14 | -0.55 % | 49.73 | 1,005.49 | 25.65 | 5.83 | 148.00 |
205/35-20 | -0.56 % | 49.72 | 1,005.65 | 25.65 | 2.82 | 71.75 |
175/70-16 | -0.58 % | 49.71 | 1,005.80 | 25.65 | 4.82 | 122.50 |
175/65-17 | +0.63 % | 50.31 | 993.74 | 25.96 | 4.48 | 113.75 |
185/65-16.5 | +0.67 % | 50.34 | 993.28 | 25.97 | 4.73 | 120.25 |
195/65-16 | +0.72 % | 50.36 | 992.83 | 25.98 | 4.99 | 126.75 |
195/30-21 | -0.73 % | 49.63 | 1,007.33 | 25.61 | 2.30 | 58.50 |
165/70-16.5 | -0.78 % | 49.61 | 1,007.78 | 25.59 | 4.55 | 115.50 |
175/55-18 | -0.84 % | 49.58 | 1,008.39 | 25.58 | 3.79 | 96.25 |
185/55-18 | +0.84 % | 50.42 | 991.61 | 26.01 | 4.01 | 101.75 |
175/80-15 | +0.89 % | 50.44 | 991.15 | 26.02 | 5.51 | 140.00 |
185/45-19 | -0.93 % | 49.53 | 1,009.31 | 25.56 | 3.28 | 83.25 |
165/85-15 | +0.96 % | 50.48 | 990.38 | 26.04 | 5.52 | 140.25 |
165/35-21 | -0.96 % | 49.52 | 1,009.62 | 25.55 | 2.27 | 57.75 |
195/85-13 | +0.99 % | 50.50 | 990.08 | 26.05 | 6.53 | 165.75 |
205/50-18 | +1.07 % | 50.53 | 989.32 | 26.07 | 4.04 | 102.50 |
195/75-14 | -1.08 % | 49.46 | 1,010.84 | 25.52 | 5.76 | 146.25 |
175/40-20 | -1.10 % | 49.45 | 1,010.99 | 25.51 | 2.76 | 70.00 |
165/70-17 | +1.16 % | 50.58 | 988.40 | 26.09 | 4.55 | 115.50 |
165/50-19 | -1.16 % | 49.42 | 1,011.60 | 25.50 | 3.25 | 82.50 |
205/65-15 | -1.18 % | 49.41 | 1,011.75 | 25.49 | 5.25 | 133.25 |
185/35-21 | +1.18 % | 50.59 | 988.25 | 26.10 | 2.55 | 64.75 |
205/75-14 | +1.21 % | 50.60 | 987.94 | 26.11 | 6.05 | 153.75 |
185/65-16 | -1.27 % | 49.37 | 1,012.67 | 25.47 | 4.73 | 120.25 |
175/65-16.5 | -1.31 % | 49.34 | 1,013.13 | 25.46 | 4.48 | 113.75 |
205/40-19 | -1.31 % | 49.34 | 1,013.13 | 25.46 | 3.23 | 82.00 |
195/40-20 | +1.34 % | 50.67 | 986.57 | 26.14 | 3.07 | 78.00 |
195/55-17 | -1.36 % | 49.32 | 1,013.58 | 25.44 | 4.22 | 107.25 |
165/65-17 | -1.36 % | 49.32 | 1,013.58 | 25.44 | 4.22 | 107.25 |
175/70-16.5 | +1.36 % | 50.68 | 986.42 | 26.15 | 4.82 | 122.50 |
165/55-19 | +1.36 % | 50.68 | 986.42 | 26.15 | 3.57 | 90.75 |
205/60-16.5 | +1.51 % | 50.76 | 984.89 | 26.19 | 4.84 | 123.00 |
165/80-15 | -1.56 % | 49.22 | 1,015.57 | 25.39 | 5.20 | 132.00 |
185/70-16 | +1.56 % | 50.78 | 984.43 | 26.20 | 5.10 | 129.50 |
165/40-21 | +1.56 % | 50.78 | 984.43 | 26.20 | 2.60 | 66.00 |
175/45-20 | +1.57 % | 50.79 | 984.28 | 26.20 | 3.10 | 78.75 |
185/85-13 | -1.60 % | 49.20 | 1,016.03 | 25.38 | 6.19 | 157.25 |
195/60-17 | +1.62 % | 50.81 | 983.82 | 26.21 | 4.61 | 117.00 |
205/55-16.5 | -1.62 % | 49.19 | 1,016.18 | 25.38 | 4.44 | 112.75 |
195/35-20 | -1.63 % | 49.18 | 1,016.33 | 25.37 | 2.69 | 68.25 |
185/30-21 | -1.65 % | 49.18 | 1,016.48 | 25.37 | 2.19 | 55.50 |
165/75-16.5 | +1.74 % | 50.87 | 982.60 | 26.24 | 4.87 | 123.75 |
175/75-15 | -1.79 % | 49.11 | 1,017.86 | 25.33 | 5.17 | 131.25 |
205/45-19 | +1.82 % | 50.91 | 981.84 | 26.26 | 3.63 | 92.25 |
175/60-18 | +1.83 % | 50.92 | 981.68 | 26.27 | 4.13 | 105.00 |
195/80-14 | +1.89 % | 50.95 | 981.07 | 26.28 | 6.14 | 156.00 |
185/50-19 | +1.89 % | 50.95 | 981.07 | 26.28 | 3.64 | 92.50 |
205/70-14 | -1.92 % | 49.04 | 1,019.23 | 25.30 | 5.65 | 143.50 |
205/70-15 | +1.95 % | 50.98 | 980.46 | 26.30 | 5.65 | 143.50 |
195/80-13 | -1.98 % | 49.01 | 1,019.84 | 25.28 | 6.14 | 156.00 |
185/50-18 | -1.98 % | 49.01 | 1,019.84 | 25.28 | 3.64 | 92.50 |
Ratio: | 25 | 30 | 35 | 40 | 45 | 50 | 55 | 60 | 65 | 70 | 75 | 80 | 85 |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Wheel Size 12
|
|||||||||||||
Wheel Size 13
|
|||||||||||||
165 |
165/25-13
d=16.25
w=1.62
-37.01%
|
165/30-13
d=16.90
w=1.95
-34.49%
|
165/35-13
d=17.55
w=2.27
-31.97%
|
165/40-13
d=18.20
w=2.60
-29.46%
|
165/45-13
d=18.85
w=2.92
-26.94%
|
165/50-13
d=19.50
w=3.25
-24.42%
|
165/55-13
d=20.15
w=3.57
-21.90%
|
165/60-13
d=20.80
w=3.90
-19.38%
|
165/65-13
d=21.44
w=4.22
-16.87%
|
165/70-13
d=22.09
w=4.55
-14.35%
|
165/75-13
d=22.74
w=4.87
-11.83%
|
165/80-13
d=23.39
w=5.20
-9.31%
|
165/85-13
d=24.04
w=5.52
-6.79%
|
175 |
175/25-13
d=16.44
w=1.72
-36.25%
|
175/30-13
d=17.13
w=2.07
-33.58%
|
175/35-13
d=17.82
w=2.41
-30.91%
|
175/40-13
d=18.51
w=2.76
-28.24%
|
175/45-13
d=19.20
w=3.10
-25.56%
|
175/50-13
d=19.89
w=3.44
-22.89%
|
175/55-13
d=20.58
w=3.79
-20.22%
|
175/60-13
d=21.27
w=4.13
-17.55%
|
175/65-13
d=21.96
w=4.48
-14.88%
|
175/70-13
d=22.65
w=4.82
-12.21%
|
175/75-13
d=23.33
w=5.17
-9.54%
|
175/80-13
d=24.02
w=5.51
-6.87%
|
175/85-13
d=24.71
w=5.86
-4.20%
|
185 |
185/25-13
d=16.64
w=1.82
-35.49%
|
185/30-13
d=17.37
w=2.19
-32.66%
|
185/35-13
d=18.10
w=2.55
-29.84%
|
185/40-13
d=18.83
w=2.91
-27.01%
|
185/45-13
d=19.56
w=3.28
-24.19%
|
185/50-13
d=20.28
w=3.64
-21.37%
|
185/55-13
d=21.01
w=4.01
-18.54%
|
185/60-13
d=21.74
w=4.37
-15.72%
|
185/65-13
d=22.47
w=4.73
-12.90%
|
185/70-13
d=23.20
w=5.10
-10.07%
|
185/75-13
d=23.93
w=5.46
-7.25%
|
185/80-13
d=24.65
w=5.83
-4.43%
|
185/85-13
d=25.38
w=6.19
-1.60%
|
195 |
195/25-13
d=16.84
w=1.92
-34.72%
|
195/30-13
d=17.61
w=2.30
-31.75%
|
195/35-13
d=18.37
w=2.69
-28.77%
|
195/40-13
d=19.14
w=3.07
-25.79%
|
195/45-13
d=19.91
w=3.45
-22.82%
|
195/50-13
d=20.68
w=3.84
-19.84%
|
195/55-13
d=21.44
w=4.22
-16.87%
|
195/60-13
d=22.21
w=4.61
-13.89%
|
195/65-13
d=22.98
w=4.99
-10.91%
|
195/70-13
d=23.75
w=5.37
-7.94%
|
195/75-13
d=24.52
w=5.76
-4.96%
|
195/80-13
d=25.28
w=6.14
-1.98%
|
195/85-13
d=26.05
w=6.53
+0.99%
|
205 |
205/25-13
d=17.04
w=2.02
-33.96%
|
205/30-13
d=17.84
w=2.42
-30.83%
|
205/35-13
d=18.65
w=2.82
-27.70%
|
205/40-13
d=19.46
w=3.23
-24.57%
|
205/45-13
d=20.26
w=3.63
-21.44%
|
205/50-13
d=21.07
w=4.04
-18.32%
|
205/55-13
d=21.88
w=4.44
-15.19%
|
205/60-13
d=22.69
w=4.84
-12.06%
|
205/65-13
d=23.49
w=5.25
-8.93%
|
205/70-13
d=24.30
w=5.65
-5.80%
|
205/75-13
d=25.11
w=6.05
-2.67%
|
205/80-13
d=25.91
w=6.46
+0.46%
|
205/85-13
d=26.72
w=6.86
+3.59%
|
Wheel Size 14
|
|||||||||||||
Wheel Size 15
|
|||||||||||||
Wheel Size 16
|
|||||||||||||
Wheel Size 16.5
|
|||||||||||||
Wheel Size 17
|
|||||||||||||
Wheel Size 18
|
|||||||||||||
165 |
165/25-18
d=21.25
w=1.62
-17.63%
|
165/30-18
d=21.90
w=1.95
-15.11%
|
165/35-18
d=22.55
w=2.27
-12.59%
|
165/40-18
d=23.20
w=2.60
-10.07%
|
165/45-18
d=23.85
w=2.92
-7.55%
|
165/50-18
d=24.50
w=3.25
-5.04%
|
165/55-18
d=25.15
w=3.57
-2.52%
|
165/60-18
d=25.80
w=3.90
0.00%
|
165/65-18
d=26.44
w=4.22
+2.52%
|
165/70-18
d=27.09
w=4.55
+5.04%
|
165/75-18
d=27.74
w=4.87
+7.55%
|
165/80-18
d=28.39
w=5.20
+10.07%
|
165/85-18
d=29.04
w=5.52
+12.59%
|
175 |
175/25-18
d=21.44
w=1.72
-16.87%
|
175/30-18
d=22.13
w=2.07
-14.19%
|
175/35-18
d=22.82
w=2.41
-11.52%
|
175/40-18
d=23.51
w=2.76
-8.85%
|
175/45-18
d=24.20
w=3.10
-6.18%
|
175/50-18
d=24.89
w=3.44
-3.51%
|
175/55-18
d=25.58
w=3.79
-0.84%
|
175/60-18
d=26.27
w=4.13
+1.83%
|
175/65-18
d=26.96
w=4.48
+4.50%
|
175/70-18
d=27.65
w=4.82
+7.17%
|
175/75-18
d=28.33
w=5.17
+9.84%
|
175/80-18
d=29.02
w=5.51
+12.52%
|
175/85-18
d=29.71
w=5.86
+15.19%
|
185 |
185/25-18
d=21.64
w=1.82
-16.10%
|
185/30-18
d=22.37
w=2.19
-13.28%
|
185/35-18
d=23.10
w=2.55
-10.45%
|
185/40-18
d=23.83
w=2.91
-7.63%
|
185/45-18
d=24.56
w=3.28
-4.81%
|
185/50-18
d=25.28
w=3.64
-1.98%
|
185/55-18
d=26.01
w=4.01
+0.84%
|
185/60-18
d=26.74
w=4.37
+3.66%
|
185/65-18
d=27.47
w=4.73
+6.49%
|
185/70-18
d=28.20
w=5.10
+9.31%
|
185/75-18
d=28.93
w=5.46
+12.13%
|
185/80-18
d=29.65
w=5.83
+14.96%
|
185/85-18
d=30.38
w=6.19
+17.78%
|
195 |
195/25-18
d=21.84
w=1.92
-15.34%
|
195/30-18
d=22.61
w=2.30
-12.36%
|
195/35-18
d=23.37
w=2.69
-9.39%
|
195/40-18
d=24.14
w=3.07
-6.41%
|
195/45-18
d=24.91
w=3.45
-3.43%
|
195/50-18
d=25.68
w=3.84
-0.46%
|
195/55-18
d=26.44
w=4.22
+2.52%
|
195/60-18
d=27.21
w=4.61
+5.49%
|
195/65-18
d=27.98
w=4.99
+8.47%
|
195/70-18
d=28.75
w=5.37
+11.45%
|
195/75-18
d=29.52
w=5.76
+14.42%
|
195/80-18
d=30.28
w=6.14
+17.40%
|
195/85-18
d=31.05
w=6.53
+20.38%
|
205 |
205/25-18
d=22.04
w=2.02
-14.58%
|
205/30-18
d=22.84
w=2.42
-11.45%
|
205/35-18
d=23.65
w=2.82
-8.32%
|
205/40-18
d=24.46
w=3.23
-5.19%
|
205/45-18
d=25.26
w=3.63
-2.06%
|
205/50-18
d=26.07
w=4.04
+1.07%
|
205/55-18
d=26.88
w=4.44
+4.20%
|
205/60-18
d=27.69
w=4.84
+7.33%
|
205/65-18
d=28.49
w=5.25
+10.45%
|
205/70-18
d=29.30
w=5.65
+13.58%
|
205/75-18
d=30.11
w=6.05
+16.71%
|
205/80-18
d=30.91
w=6.46
+19.84%
|
205/85-18
d=31.72
w=6.86
+22.97%
|
Wheel Size 19
|
|||||||||||||
Wheel Size 20
|
|||||||||||||
165 |
165/25-20
d=23.25
w=1.62
-9.87%
|
165/30-20
d=23.90
w=1.95
-7.36%
|
165/35-20
d=24.55
w=2.27
-4.84%
|
165/40-20
d=25.20
w=2.60
-2.32%
|
165/45-20
d=25.85
w=2.92
+0.20%
|
165/50-20
d=26.50
w=3.25
+2.72%
|
165/55-20
d=27.15
w=3.57
+5.24%
|
165/60-20
d=27.80
w=3.90
+7.75%
|
165/65-20
d=28.44
w=4.22
+10.27%
|
165/70-20
d=29.09
w=4.55
+12.79%
|
165/75-20
d=29.74
w=4.87
+15.31%
|
165/80-20
d=30.39
w=5.20
+17.83%
|
165/85-20
d=31.04
w=5.52
+20.34%
|
175 |
175/25-20
d=23.44
w=1.72
-9.11%
|
175/30-20
d=24.13
w=2.07
-6.44%
|
175/35-20
d=24.82
w=2.41
-3.77%
|
175/40-20
d=25.51
w=2.76
-1.10%
|
175/45-20
d=26.20
w=3.10
+1.57%
|
175/50-20
d=26.89
w=3.44
+4.24%
|
175/55-20
d=27.58
w=3.79
+6.91%
|
175/60-20
d=28.27
w=4.13
+9.58%
|
175/65-20
d=28.96
w=4.48
+12.26%
|
175/70-20
d=29.65
w=4.82
+14.93%
|
175/75-20
d=30.33
w=5.17
+17.60%
|
175/80-20
d=31.02
w=5.51
+20.27%
|
175/85-20
d=31.71
w=5.86
+22.94%
|
185 |
185/25-20
d=23.64
w=1.82
-8.35%
|
185/30-20
d=24.37
w=2.19
-5.53%
|
185/35-20
d=25.10
w=2.55
-2.70%
|
185/40-20
d=25.83
w=2.91
+0.12%
|
185/45-20
d=26.56
w=3.28
+2.95%
|
185/50-20
d=27.28
w=3.64
+5.77%
|
185/55-20
d=28.01
w=4.01
+8.59%
|
185/60-20
d=28.74
w=4.37
+11.42%
|
185/65-20
d=29.47
w=4.73
+14.24%
|
185/70-20
d=30.20
w=5.10
+17.06%
|
185/75-20
d=30.93
w=5.46
+19.89%
|
185/80-20
d=31.65
w=5.83
+22.71%
|
185/85-20
d=32.38
w=6.19
+25.53%
|
195 |
195/25-20
d=23.84
w=1.92
-7.59%
|
195/30-20
d=24.61
w=2.30
-4.61%
|
195/35-20
d=25.37
w=2.69
-1.63%
|
195/40-20
d=26.14
w=3.07
+1.34%
|
195/45-20
d=26.91
w=3.45
+4.32%
|
195/50-20
d=27.68
w=3.84
+7.30%
|
195/55-20
d=28.44
w=4.22
+10.27%
|
195/60-20
d=29.21
w=4.61
+13.25%
|
195/65-20
d=29.98
w=4.99
+16.22%
|
195/70-20
d=30.75
w=5.37
+19.20%
|
195/75-20
d=31.52
w=5.76
+22.18%
|
195/80-20
d=32.28
w=6.14
+25.15%
|
195/85-20
d=33.05
w=6.53
+28.13%
|
205 |
205/25-20
d=24.04
w=2.02
-6.82%
|
205/30-20
d=24.84
w=2.42
-3.69%
|
205/35-20
d=25.65
w=2.82
-0.56%
|
205/40-20
d=26.46
w=3.23
+2.56%
|
205/45-20
d=27.26
w=3.63
+5.69%
|
205/50-20
d=28.07
w=4.04
+8.82%
|
205/55-20
d=28.88
w=4.44
+11.95%
|
205/60-20
d=29.69
w=4.84
+15.08%
|
205/65-20
d=30.49
w=5.25
+18.21%
|
205/70-20
d=31.30
w=5.65
+21.34%
|
205/75-20
d=32.11
w=6.05
+24.47%
|
205/80-20
d=32.91
w=6.46
+27.59%
|
205/85-20
d=33.72
w=6.86
+30.72%
|
Wheel Size 21
|
The information on this page is intended to be helpful, but there is absolutely no guarantee of its accuracy, safety, or applicability for any particular use. The data is calculated mathematically, not taken from any official or recommended guide.
Please excercise a common sense, follow manufacturer and dealer recommendations, and check with other sources.
Tires are a safety equipment, don't take their selection lightly!